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These multipurpose test strips help you measure pH, nitrite, nitrate, general hardness and carbonate hardness in your fresh- or saltwater aquarium to help keep your fish safe and healthy.
Help keep your fresh- or saltwater aquarium clean and safe with these API 5 in 1 Aquarium Test Strips. The multipurpose strips measure your water's pH, nitrite and nitrate levels as well as general and carbonate hardness for a thorough test. The kit comes with precise colour charts to help make reading your test strip simple, so you can easily locate and resolve imbalances in your aquarium water.

Tests pH, nitrite, nitrate, general hardness and carbonate hardness to help ensure the health and safety of your aquarium

Not accurate at all.
These strips are very easy to use however, not very accurate. Far more accurate results can be had using a liquid test kit. For a little more than 10 bucks a liquid test kit can be had with better results.
December 12, 2014

Not Accurate Enough-Hard To Read
Bought these Strips to test water perimeters in 5 gallon tank that we were cycling. It may have been due to our age/eyesight, but the Strips were hard to read/compare to the color codes on the container. They were most definitely EASY to use as far as "dip in tank, pull out, wait a minute and read.
February 14, 2014

So So
Yes the strips are incredibly easy to use. All you have to do is dip it in the water and within about a minute you have your results. The problem is they are not always accurate results. If you are serious about your aquarium and your water care, spend a little extra and get the API freshwater master kit. It is very easy to use and your results are incredibly accurate and then you can make your adjustments from there. The money you waste on strips all the time, you could just get the master kit and be done with it.
If you just have a little 5-10 gallon tank and you have never had water issues, these may be just fine for you. But for larger tanks or for those who need exact numbers, strips really aren't for you.
July 13, 2013

Eh
They were easy enough to use. Just dip them in the water, wait a bit, check results against the guide. However, they always showed my tank as basic by about 1 pH above neutral no matter the water changes. They also always showed my tank as well within the safe range for nitrates and nitrites even when I got lazy about water changes. Also the color guide was not laminated or water resistant so eventually the colors bled off enough to make the whole thing useless. Not worth the money.
June 8, 2013